电磁波在等离子体中的热致非线性衰减

研究了电磁波对等离子体进行加热所产生的非线性效应,分析了电磁波在等离子体中传播的热致非线性衰减,通过与线性衰减的计算结果进行比较,指出当电磁波频率较低且传输距离较远时线性计算产生较大误差,必须考虑电子温度升高引起的非线性衰减,并且分析了非线性衰减随频率、入射电波场强、传输距离等的变化关系,指出在一定条件下,电波对等离子体的加热可使电波的非线性衰减小于线性衰减。

On Nonlinear Attenuation of EM Wave in Heated Plasmas

Nonlinear propagation characteristics of EM wave in heated plasma is analyzed and compared with those of line- ar case.The comparison indicates that calculated results using linear theory may cause great error when frequency is low and propa- gation path long,and the nonlinear phenomena caused by increased temperature should be considered under this condition.The re- lationship between nonlinear attenuation and some parameters such as frequency,strength of incident wave and propagating distance is also discussed.